Patents by Inventor Deborah R. Repman

Deborah R. Repman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20120149939
    Abstract: Recovery of acid, and in particular acetic acid, in a vinyl acetate production process. Vinyl acetate production produces heavy ends that comprise acetate containing compounds, such as monomers and polymers. Acid preferably is recovered by hydrolyzing the heavy ends and separating the resulting hydrolyzed stream to recover acid formed from the from acetate containing compounds.
    Type: Application
    Filed: December 10, 2010
    Publication date: June 14, 2012
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Ilias S. Kotsianis, Hannah E. Toomey, Stacey Somerville, Ismael Tejeda, Alba Lala, Thomas F. Orsak, Brett V. Memmott, Kevin Hanks, Deborah R. Repman, Victor J. Johnston, Mark A. Deimund
  • Publication number: 20120078006
    Abstract: This invention provides an integrated two stage economical process for the production of vinyl acetate monomer (VAM) from acetic acid in the vapor phase. First, acetic acid is selectively hydrogenated over a hydrogenating catalyst composition to form ethylene either in a single reactor zone or in a dual rector zone wherein the intermediate hydrogenated products are either dehydrated and/or cracked to form ethylene. In a subsequent second stage so formed ethylene is reacted with molecular oxygen and acetic acid over a suitable catalyst to form VAM. In an embodiment of this invention reaction of acetic acid and hydrogen over a hydrogenation catalyst and subsequent reaction over a dehydration catalyst selectively produces ethylene, which is further mixed with acetic acid and molecular oxygen and reacted over a supported palladium/gold/potassium catalyst.
    Type: Application
    Filed: December 2, 2011
    Publication date: March 29, 2012
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Victor J. Johnston, Laiyuan Chen, James H. Zink, Josefina T. Chapman, Barbara F. Kimmich, Deborah R. Repman
  • Patent number: 8071806
    Abstract: This invention provides an integrated two stage economical process for the production of vinyl acetate monomer (VAM) from acetic acid in the vapor phase. First, acetic acid is selectively hydrogenated over a hydrogenating catalyst composition to form ethylene either in a single reactor zone or in a dual rector zone wherein the intermediate hydrogenated products are either dehydrated and/or cracked to form ethylene. In a subsequent second stage so formed ethylene is reacted with molecular oxygen and acetic acid over a suitable catalyst to form VAM. In an embodiment of this invention reaction of acetic acid and hydrogen over a hydrogenation catalyst and subsequent reaction over a dehydration catalyst selectively produces ethylene, which is further mixed with acetic acid and molecular oxygen and reacted over a supported palladium/gold/potassium catalyst.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: December 6, 2011
    Assignee: Celanese International Corporation
    Inventors: Victor J. Johnston, Barbara F. Kimmich, Deborah R. Repman, James H. Zink, Josefina T. Chapman, Laiyuan Chen
  • Publication number: 20110071312
    Abstract: This invention provides an integrated two stage economical process for the production of vinyl acetate monomer (VAM) from acetic acid in the vapor phase. First, acetic acid is selectively hydrogenated over a hydrogenating catalyst composition to form ethylene either in a single reactor zone or in a dual rector zone wherein the intermediate hydrogenated products are either dehydrated and/or cracked to form ethylene. In a subsequent second stage so formed ethylene is reacted with molecular oxygen and acetic acid over a suitable catalyst to form VAM. In an embodiment of this invention reaction of acetic acid and hydrogen over a hydrogenation catalyst and subsequent reaction over a dehydration catalyst selectively produces ethylene, which is further mixed with acetic acid and molecular oxygen and reacted over a supported palladium/gold/potassium catalyst.
    Type: Application
    Filed: December 2, 2010
    Publication date: March 24, 2011
    Applicant: CELANESE INTERNATIONAL CORPORATION
    Inventors: Victor J. Johnston, Laiyuan Chen, James H. Zink, Josefina T. Chapman, Barbara F. Kimmich, Deborah R. Repman
  • Patent number: 7855303
    Abstract: This invention provides an integrated two stage economical process for the production of vinyl acetate monomer (VAM) from acetic acid in the vapor phase. First, acetic acid is selectively hydrogenated over a hydrogenating catalyst composition to form ethylene either in a single reactor zone or in a dual rector zone wherein the intermediate hydrogenated products are either dehydrated and/or cracked to form ethylene. In a subsequent second stage so formed ethylene is reacted with molecular oxygen and acetic acid over a suitable catalyst to form VAM. In an embodiment of this invention reaction of acetic acid and hydrogen over a hydrogenation catalyst and subsequent reaction over a dehydration catalyst selectively produces ethylene, which is further mixed with acetic acid and molecular oxygen and reacted over a supported palladium/gold/potassium catalyst.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: December 21, 2010
    Assignee: Celanese International Corporation
    Inventors: Victor J. Johnston, Laiyuan Chen, James H. Zink, Josefina T. Chapman, Barbara F. Kimmich, Deborah R. Repman
  • Patent number: 7820852
    Abstract: A process for the selective production of ethyl acetate by vapor phase reaction of acetic acid over a hydrogenating catalyst composition to form ethyl acetate is disclosed and claimed. In an embodiment of this invention reaction of acetic acid and hydrogen over platinum and copper supported on silica selectively produces ethyl acetate in a vapor phase at a temperature of about 250° C.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: October 26, 2010
    Assignee: Celanese International Corporation
    Inventors: Victor J. Johnston, James H. Zink, Deborah R. Repman, Laiyuan Chen, Barbara F. Kimmich, Josefina T. Chapman, Jan Cornelis van der Waal, Virginie Zuzaniuk
  • Patent number: 7820853
    Abstract: This invention provides an integrated three step economical process for the production of vinyl acetate monomer (VAM) from acetic acid in the vapor phase. First, acetic acid is selectively hydrogenated over a hydrogenating catalyst composition to form ethyl acetate which is cracked to form ethylene and acetic acid in the second step and in a subsequent step so formed ethylene and acetic acid is reacted with molecular oxygen over a suitable catalyst to form VAM. In an embodiment of this invention reaction of acetic acid and hydrogen over platinum and copper supported on silica selectively produces ethyl acetate in a vapor phase at a temperature of about 250° C., which is cracked over a NAFION catalyst to form ethylene and acetic acid at a temperature of about 185° C., which is mixed with molecular oxygen and reacted over a palladium/gold/potassium catalyst supported on titania to form VAM at a temperature of about 150° C. to 170° C.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: October 26, 2010
    Assignee: Celanese International Corporation
    Inventors: Victor J. Johnston, James H. Zink, Deborah R. Repman, Barbara F. Kimmich, Josefina T. Chapman, Laiyuan Chen
  • Publication number: 20100168467
    Abstract: This invention provides an integrated three step economical process for the production of vinyl acetate monomer (VAM) from acetic acid in the vapor phase. First, acetic acid is selectively hydrogenated over a hydrogenating catalyst composition to form ethyl acetate which is cracked to form ethylene and acetic acid in the second step and in a subsequent step so formed ethylene and acetic acid is reacted with molecular oxygen over a suitable catalyst to form VAM. In an embodiment of this invention reaction of acetic acid and hydrogen over platinum and copper supported on silica selectively produces ethyl acetate in a vapor phase at a temperature of about 250° C., which is cracked over a NAFION catalyst to form ethylene and acetic acid at a temperature of about 185° C., which is mixed with molecular oxygen and reacted over a palladium/gold/potassium catalyst supported on titania to form VAM at a temperature of about 150° C. to 170° C.
    Type: Application
    Filed: December 31, 2008
    Publication date: July 1, 2010
    Inventors: Victor J. Johnston, James H. Zink, Deborah R. Repman, Barbara F. Kimmich, Josefina T. Chapman, Laiyuan Chen
  • Publication number: 20100125148
    Abstract: This invention provides an integrated two stage economical process for the production of vinyl acetate monomer (VAM) from acetic acid in the vapor phase. First, acetic acid is selectively hydrogenated over a hydrogenating catalyst composition to form ethylene either in a single reactor zone or in a dual rector zone wherein the intermediate hydrogenated products are either dehydrated and/or cracked to form ethylene. In a subsequent second stage so formed ethylene is reacted with molecular oxygen and acetic acid over a suitable catalyst to form VAM.
    Type: Application
    Filed: November 14, 2008
    Publication date: May 20, 2010
    Inventors: Victor J. Johnston, Laiyuan Chen, James H. Zink, Josefina T. Chapman, Barbara F. Kimmich, Deborah R. Repman
  • Publication number: 20100029980
    Abstract: A process for the selective production of ethyl acetate by vapor phase reaction of acetic acid over a hydrogenating catalyst composition to form ethyl acetate is disclosed and claimed. In an embodiment of this invention reaction of acetic acid and hydrogen over platinum and copper supported on silica selectively produces ethyl acetate in a vapor phase at a temperature of about 250° C.
    Type: Application
    Filed: July 31, 2008
    Publication date: February 4, 2010
    Inventors: Victor J. Johnston, James H. Zink, Deborah R. Repman, Laiyuan Chen, Barbara F. Kimmich, Josefina T. Chapman, Jan Cornelis van der Waal, Virginie Zuzaniuk
  • Publication number: 20080132723
    Abstract: The present invention provides an integrated, optimized process for the production of ethylene, carbon monoxide and acetic acid from an ethane feed, including reacting ethane with oxygen in the presence of a catalyst to produce ethylene, carbon monoxide and acetic acid in a reactor, wherein the catalyst comprises the elements Mo, Pd, X, and Y in the gram-atomic ratios MOa Pdb Xc Yd, and the oxygen partial pressure in the reactor is about 15 psia to about 50 psia. The partial pressure of ethane in the reactor is about 50 psia to about 150 psia.
    Type: Application
    Filed: December 4, 2006
    Publication date: June 5, 2008
    Inventors: Victor J. Johnston, Joseph G. Duff, Debra Ann Ryan, Deborah R. Repman, Melchior A. Meilchen, David W. Townsend, Cathy L. Tway